/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alipay.sofa.tracer.plugins.datasource;

/**
 * @author shusong.yss
 * @author qilong.zql
 * @since 2.2.0
 */
public interface Interceptor {

    /**
     * execute interceptor chain
     * @param chain
     * @return
     * @throws Exception
     */
    Object intercept(Chain chain) throws Exception;

    interface Chain {

        Object proceed() throws Exception;

        String getOriginalSql();

        String getProcessingSql();

        void setProcessingSql(String processingSql);

        BaseDataSource getDataSource();

        ExtendedConnection getConnection();

        ExtendedStatement getStatement();

        boolean hasNext();

        Interceptor next();
    }
}
